CN102257764B - Multicast quality of service module and method - Google Patents
Multicast quality of service module and method Download PDFInfo
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- CN102257764B CN102257764B CN200980150474.1A CN200980150474A CN102257764B CN 102257764 B CN102257764 B CN 102257764B CN 200980150474 A CN200980150474 A CN 200980150474A CN 102257764 B CN102257764 B CN 102257764B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
- H04L12/283—Processing of data at an internetworking point of a home automation network
- H04L12/2834—Switching of information between an external network and a home network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/185—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with management of multicast group membership
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
- H04L12/2838—Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/15—Flow control; Congestion control in relation to multipoint traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
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Abstract
The present application describes a Qos module for use in a home network that comprises a plurality of devices and a home gateway. The home gateway enables to receive a multicast stream and to forward the multicast stream to at least one of the devices under control of a multicast proxy module. The Qos module further comprises the multicast proxy module for also sending, upon reception of a multicast join message from one of the devices for joining the multicast stream, a Quality of Service request. The Quality of Service request comprises an address of the home gateway and an address of said device. The Qos module further comprises a unicast Quality of Service control module for reception of the Quality of Service request and for sending a unicast Quality of Service event message in order to request thereby provision of Quality of Service for the multicast stream when being forwarded from the home gateway to the device.
Description
Technical field
Qos module that the present invention relates to use in home network and associated method.This home network typically comprises a plurality of equipment and home gateway.Home gateway can flow and under the control of multicast agent module, multicast data flow and multicast service control are transmitted to at least one equipment by receiving group.
Background technology
What have to explain is, multicast is a kind of for information being passed to the network addressing method of one group of destination, an only transmission of information is carried out on every link of network to the strategy of full blast in described one group of destination simultaneously, only when going to the link disjoint of a plurality of destinations, just create duplicate.Phrase " multicast " is typically used in reference to IP multicast, and it is generally used for Streaming Media and Internet television application.In IP multicast, the realization of multicast concept occurs in IP route layer, and wherein router is generated as the multicast data flow that sends in real time multicast destination address spanning tree and generates best distribution path.Node in network is only responsible for copying the grouping that arrives a plurality of essential recipients.Using the most general lower layer protocol of multicast addressing is User Datagram Protoco (UDP) UDP.Key in IP multicast comprises that IP multicast group address, multicast distribution tree and receiver drive tree to create.Source and reciever carry out sending and receiving content with IP multicast group address respectively.Use group address, source is as the IP destination address in their packet.Recipient carrys out informing network with this group address, and their interesting receptions send to the grouping of that group.
The agreement that adds group that recipient uses is called as Internet Group Management Protocol or IGMP.Internet Group Management Protocol, referred to as IGMP, is the communication protocol for the member of managing internet agreement multicast group.IP main frame and adjacent multicast are used IGMP.IGMP can be for Online Video stream and game.
For example, in some topology (being similar to the topology of tree), not essential operation multicast routing protocol.Equipment be enough to study and agent group information about firms and based on described information simply forwarding multicasting divide into groups.This multicast agent module that is called igmp proxy is only carried out multicast data forwarding stream based on Internet Group Management Protocol IGMP or multicast monitoring discovery MLD information about firms.This igmp proxy module with igmp proxy support is such as RFC4605 igmp proxy text-for explaining that the network working group request of 4605dd has description, it was issued in August, 2006, and exercise question is " Internet Group Management Protocol (IGMP)/multicast monitoring discovery (MLS)-based on multicast forwarding (" IGMP/MLCD agency ") ".
In the event that multicast is further distributed in home network, this multicast agent module above-mentioned is controlled multicast data flow by the home gateway of the distinct device in home network-oriented conventionally.
The problem occurring when utilizing multicast in home network is, for example, provide the ISP of multicast data flow (for example distributed video of home network-oriented) cannot guarantee specify desired priority and in home network, carry out suitable RSVP for this multicast data flow for the multicast data flow in home network.
Summary of the invention
An object of the present invention is to provide the Qos module in a kind of home network, described home network comprises a plurality of equipment and home gateway, and home gateway can flow and multicast data flow is transmitted to at least one equipment in home network under the control of multicast agent module by receiving group thus, but Qos module further can provide service quality for this multicast data flow in home network thus.
Above-mentioned purpose is achieved in the following ways: Qos module comprise this multicast agent module and receiving an equipment in home network when adding the multicast join message of described multicast data flow, multicast agent module can be sent comprise the quality of service request of the address of home gateway and the address of requesting service.In addition, Qos module comprises unicast service quality control module, be used for receiving this quality of service request, and when multicast data flow is forwarded to requesting service from home gateway, for sending unicast service quality event message, for asking thus, for multicast data flow, provide service quality.Have to explain, unicast service quality event message can be sent to the clean culture Qos manager in home network.
Have to explain, UPnP UPnP agreement is conventionally installed in home network.UPnP UPnP is one group of computer protocol that UPnP forum promulgates.The target of UPnP is the realization that permission equipment seamlessly connects and simplify the family's network for serving, for example data sharing of described service, communication and amusement; And in company's environment, for the simplification of computer module, install.The UPnP device control protocol that UPnP is implemented on communication standard open, based on internet by definition realizes above-mentioned target.
In addition, UPnP utilizes UPnP Qos to provide service quality for the unicast service in home network.
Service quality QoS is the critical services function that is applicable to UPnP, for example Voice & Video.For the QoS of UPnP, by the service function of the one-way traffic flow between two equipment, form and describe such as following grade:
-class of service, the kind of business in its indicating services stream, for example, audio frequency, video etc.,
-task identifier, its identification data grouping belongs to unique Business Stream.
-business norms, one group of parameter that it comprises the characteristic that defines Business Stream, for example service requirement and scheduling.
Between the overall architecture of UPnP QoS system and various element, comprise alternately control point application/module, suppose that it has source, storehouse (sink) and must be by the knowledge of streamed content.When discovery source, control point and receiver are together with will flowing the content of transmission, the Service Quality Management device Qos manager in its request network is set up QoS Business Stream.Control point creates traffic descriptor structure and is transmitted to Qos-manager.Next Qos manager module is used for the suitable strategy of traffic descriptor separately to the request of quality of service policy retainer.Based on this strategy, Qos manager can configure source and receiver apparatus separately, for processing new business according to the relative importance of the set given traffic streams of Qos strategy retainer.In this way, be provided for the centralized UPnP Qos mechanism that enables or forbid allowing strategy of whole home network.According to the information providing in the quality of service request for given traffic streams, business is classified.The type of information is provided in traffic descriptor, and described traffic descriptor comprises the grade of service between other project, source and destination network ip address and the agreement of stream.When carrying out QoS resource request, by the service of Qos manager, be forwarded to Qos strategy retainer and served.It is the information providing in request is provided and in business game, returns to the importance that should give Business Stream that Qos strategy retainer is served.
According to this application, for the multicast data flow coming from the home network of access network provides support, the home network device that it enables by for example UPnP, multicast data flow is supported Qos UPnP, in described multicast data flow, subscribe in home network device, for example customer premises equipment, CPE or Set Top Box.Set Top Box in home network is subscribed to self by the gateway in home network in the multicast data flow from access network.The utilization of this family/gateway for example, arranges and sets up service quality to intercepting further of multicast join message (IGMP message) in the multicast data flow of input RTP/User Datagram Protoco (UDP) RTP/UDP.This actual Qos method by initiating QoS request realizes foregoing.This quality of service request can by web services for example trigger or for example UPnP message realize.This quality of service request for example, is caught by unicast service quality control module (UPnP Qos control point), and it can receive this quality of service request.Unicast service quality control module further can send unicast service quality event message when receiving quality of service request, and it is for when multicast flow is forwarded to requesting service from home gateway, and asking thus provides service quality for multicast data flow.This request is for example for example, to be caught by Service Quality Management device (, UPnP Qos manager).
Optionally, further comprise multicast agent module, for the address with the requesting service that the reference of multicast data flow is associated separately in the storage of multicast member database.
Optionally, utilize the media access control address of described equipment or the address that source Internet Protocol address is realized equipment.
Similarly, can select to utilize Internet Protocol address and the media access control address of the transmission (transput) of the described home gateway be coupled to described equipment to realize home gateway address.
Optionally, multicast agent module is the Internet Group Management Protocol agency for the member of managing internet agreement multicast group.
Optionally, unicast service quality control module is that UPnP enables and utilizes universal plug and play control point to realize, universal plug and play control point with for the traffic aided connection of enabling unicast service quality of multicast data flow separately.
In addition, quality of service request also comprises the reference of multicast data flow separately.This to the reference of multicast data flow at question blank based on this reference of multicast data flow is separately inquired about to relevant Qos grade.
This question blank comprises the reference entry to the multicast data flow with reservation service rank correlation connection.The reference of this multicast data flow utilizes multicast Media Access Control Address or multicast the Internet protocol address to realize conventionally.The relevant grade of service for such as voice, video, do one's best etc.
Optionally, this question blank comprising with reference to the multicast data flow of its associated classes of service, for example can be included in, in unicast service quality control module, Qos manager or Qos strategy retainer (UPnP Qos strategy retainer).
It should be noted in the discussion above that the term using in claim " does not comprise " should be interpreted as the restriction to listed thereafter device.Therefore, the scope of statement " a kind of equipment comprises device A and B " should not be restricted to the equipment that only comprises assembly A and B.It means about the present invention, and the only associated component of equipment is A and B.
Similarly, it should be noted in the discussion above that it is only direct connection that the term " coupling " using equally in the claims should not be interpreted as limiting.Therefore, the scope of statement " being coupled to the device A of equipment B " should not be restricted in equipment or system, and the output of device A is directly connected to the input of equipment B.This means between the output of A and the input of B and have path, it can be the path that comprises miscellaneous equipment or device.
Accompanying drawing explanation
By reference to the execution mode being introduced below in conjunction with accompanying drawing, above and other objects of the present invention and feature will become more clear and will understand better the present invention self, and wherein Fig. 1 represents home network.In Fig. 1, illustrated and followed making an explanation according to the work of Qos module of the present invention the functional description by the disparate modules shown in it of its telecommunication environment.Based on above-mentioned explanation, the actual realization of module is apparent for a person skilled in the art and will be therefore not described in detail.In addition, by the operation principle of the method for further detailed introduction operation Qos module.
Embodiment
Fig. 1 shows the home network 107 that is coupled to video server 103 in core network.Home network 107 comprises and is coupled to video server 103 to receive the home gateway 101 for the data of home network 107.Home gateway 101 is coupled to a plurality of equipment (only showing one), and for example equipment 1102.
Qos module 100 according to the present invention is included in home gateway 101.Qos module 100 comprises multicast agent module 104 and the unicast service quality control module 105 intercoupling.Multicast agent module 104 is coupled to equipment 1 102.Qos module 100 further comprises Service Quality Management device 106, and it is coupled to unicast service quality control module 105 and quality of service policy retainer 108.
Let us hypothesis, unicast service quality control module 105, Service Quality Management device 106, quality of service policy retainer 108 and equipment 1 102 are to support UPnP's.And let us further supposes, multicast proxy module 104 is igmp proxys.
In order to ask to add the multicast data flow MC1 having with reference to 200, equipment 1 102 sends IGMP and adds message 201.This adds message to comprise group address, and it is the sign for multicast data flow MC1 200.
Igmp proxy 104 on home gateway 101 is added entry in its member database 302 to.
According to this application, in order to support UPnP Qos, utilize the source unicast ip address (or MAC Address) of equipment 1 102 to expand the entry in member database 302 on home gateway 101.Should be noted that, this application is not limited to the use of IP address.The similar description of the MAC Address based on equipment 1 102 is also possible.
After this, igmp proxy 104 initiating QoS requests 202, UPnp event for example, it comprises information below: the source IP address of the IP address of home gateway (by shown in the GW of family) and equipment 1 102 (by shown in equipment 1).As the unicast service quality control module 105 at UPnP Qos control point, can obtain quality of service request event 202 and in order to prepare unicast service quality event message, it be processed.Because be to support UPnP, unicast service quality event message 203 is TrafficId.In processing procedure, fill SoureAdress and the DestinationAddress of UPNP Qos parameter TrafficId.
The grade of service that UPnP Qos control point 105 also needs for service business, it is necessary it is that Qos provides.Therefore, UPnP Qos control point 105 creates and keeps question blank 301, and it for example comprises, for example, for the association between the reference of multicast data flow (, multicast ip address) and the grade of service (, voice, video, do one's best etc.).
A kind of possible realization is that multicast is with reference to being included in quality of service request 202 (illustrating by MC1) and unicast service quality control module 105 from quality of service request 202 retrieval multicast ip address in Fig. 1 and using address above mentioned to inquire about relevant Qos grade its question blank 301.
Have to explain, question blank 301 also may be included in service managerZ-HU 106 or service strategy retainer 108.
When determining the grade of service for multicast data flow MC1, the grade of service is filled in UPnP Qos parameter TrafficClass, it is that a part of UPnP Qos parameter Tspec and its are again parts of UPnP Qos parameter TrafficDescriptor.
In step below, at Service Quality Management device, 106 places trigger QosManager:RequestTrafficQos or QosManager:RequestExtendedTrafficQos, in order to have the specific multicast stream MC1 of the QosBoundarySourceAddress address of being implemented by the IP address of equipment 1 102 and the QosBoundaryDestinationAddress being implemented by the IP address of home gateway 101.
In such a way, Service Quality Management device is that multicast data flow MC1 sets up Qos, and described multicast data flow MC1 is forwarded to equipment 1 102 by home gateway 101.This is illustrated by two arrows that leave Service Quality Management device, and one towards being coupled to home gateway 101 transmission of equipment 1 102 and another arrow towards equipment 1 102 self.Therefore, Fig. 1 shows the Qos-bandwidth pipeline between home gateway 101 and equipment 1 102, and described pipeline comprises multicast data flow MC1.
Similarly, the additional entries of the address of equipment 1 in the multicast packet storehouse of igmp proxy, is associated with the reference of described multicast data flow, and by the request of igmp proxy initiating QoS, has caused the foundation for the UPnP Qos of specific multicast stream.
Similarly principle can be applied to trigger release UPnP Qos.Because multicast agent module 104 is from wanting the equipment that leaves multicast tree to receive this multicast leave group message, is after this called as and leaves equipment (not shown).Once receive this multicast leave group message, remove the entry of leaving equipment in the multicast packet storehouse 302 of multicast agent module 104.In addition, multicast agent module 104 is initiated the message that enters home gateway 101, for example " service quality release event " (not shown).This message preferably comprises following information: the IP address (or MAC Address) of home gateway 101 and the IP address (or MAC Address) of leaving equipment.Unicast service quality control module 105 subscribe to this " service quality release event " once and catch this event message, unicast service quality control module 105 knows that home gateway 101 is no longer to leaving device forwards multicast data flow.Thus, the same UPnP QoS discharging for multicast data flow.
In addition, when the second equipment (not shown), also wishing to subscribe in the event of multicast data flow, described multicast data flow, for for example having the MC1 with reference to 200, has been subscribed at least one equipment thereon, and application is according to the same rationale of this application.The other UPnP Qos realizing for multicast data flow MC1 arranges, and described multicast data flow MC1 is from home gateway 101 to the 2nd Qos device forwards.
Finally, have to explain, in the time can using IGMP and UPnP Qos when home network device, equipment self comprises that, in the situation at UPnP Qos control point, equipment oneself can be set up the Qos that is used for asked multicast data flow.In this case, the Qos for same multicast stream should not set up or discharge in the unicast service quality control point 105 of home gateway 101 because Qos by or will be set up by the UPnP control point of this particular device.
For fear of the multicast data flow for identical, provide two Qos, whether the unicast service quality control module 105 of home gateway 101 is carried out inquiry on all UPnP Qos equipment, take and control as specific multicast stream has been set up UPnP Qos by the UPnP Qos control point of in equipment.Initiating to carry out above-mentioned inquiry before unicast service quality event message 203.In fact, before sending multicast data flow, the equipment with UPnP Qos support can be set up Qos before request multicast data flow is for example installed Qos.
Last remarks are according to functional module, to have introduced embodiments of the present invention above.By the functional descriptions of these modules of providing above, the technical staff in design of electronic devices field easily expects how utilizing known electronic building brick to manufacture the execution mode of these modules.Therefore, do not provide the detailed architecture of functional block content.
Although above in conjunction with concrete equipment introduction principle of the present invention, can be expressly understood, above-mentioned explanation be only by the mode of example, make and be not the restriction of the scope of the invention to defining in accessory claim.
Claims (7)
1. a Qos module (100), it uses in the home network that comprises a plurality of equipment and home gateway (101), described home gateway (101) can receiving group stream and under the control of multicast agent module (104) to multicast data flow described at least one device forwards in described a plurality of equipment, it is characterized in that, described Qos module (100) comprising:
Described multicast agent module (104), for receive from the equipment (102) of described a plurality of equipment when adding the multicast join message (201) of described multicast data flow, transmission comprises the quality of service request (202) of the address of described home gateway (101) and the address of a described equipment (102), and described quality of service request (202) further comprises the reference of described multicast data flow; And
The described address of the described equipment (102) that storage is associated with the reference of described multicast data flow in multicast member database (302);
Unicast service quality control module (105), be used for receiving described quality of service request (202) and for when multicast data flow is forwarded to a described equipment (102) from described home gateway (101), send unicast service quality event message for asking as described multicast data flow provides service quality thus, described Qos module further comprises for the described question blank (301) with reference to the relevant Qos grade of inquiry based on described multicast data flow.
2. Qos module according to claim 1 (100), is characterized in that, the described address of a described equipment (102) is the media access control address of a described equipment (102) and any one in the Internet Protocol address of source.
3. Qos module according to claim 1 (100), it is characterized in that, the described address of described home gateway (101) is to be coupled to the Internet Protocol address of transmission of described home gateway of a described equipment (102) and any one in media access control address.
4. Qos module according to claim 1 (100), is characterized in that, described multicast agent module (104) is the Internet Group Management Protocol agency for managing internet agreement multicast group members.
5. Qos module according to claim 1 (100), is characterized in that, described unicast service quality control module (105) is the universal plug and play control point being associated with the service realizing for the unicast service quality of described multicast data flow.
6. Qos module according to claim 1 (100), is characterized in that, described question blank (301) is included among any one in described unicast service quality control module (105), Qos manager (106) and Qos strategy retainer (108).
7. the method that the Qos module in home network is used, described home network comprises a plurality of equipment and home gateway (101), described home gateway (101) can flow and can described multicast data flow be forwarded to at least one equipment in described a plurality of equipment under the control of multicast agent module (104) by receiving group, it is characterized in that, described method comprises:
An equipment (102) in receiving described a plurality of equipment when adding the multicast join message (201) of described multicast data flow, described multicast agent module (104) sends the quality of service request (202) that comprises the address of described home gateway (101) and the address of a described equipment (102), and described quality of service request (202) further comprises the reference of described multicast data flow; And
Described multicast agent module (104) is stored the described address of the described equipment (102) being associated with the reference of described multicast data flow in multicast member database (302);
By unicast service quality control module (105), receive described quality of service request (202); And
When multicast data flow is forwarded to a described equipment (102) from described home gateway (101), described unicast service quality control module (105) send unicast service quality event message for ask thus for described multicast data flow provide service quality and;
Described unicast service quality control module is the relevant Qos grade of described reference inquiry based on described multicast data flow in question blank (301).
Applications Claiming Priority (3)
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| EP08291200A EP2200219A1 (en) | 2008-12-16 | 2008-12-16 | Multicast quality of service module and method |
| EP08291200.7 | 2008-12-16 | ||
| PCT/EP2009/008659 WO2010069480A1 (en) | 2008-12-16 | 2009-11-30 | Multicast quality of service module and method |
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| CN102257764A CN102257764A (en) | 2011-11-23 |
| CN102257764B true CN102257764B (en) | 2014-09-24 |
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| EP (1) | EP2200219A1 (en) |
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| CN106257881A (en) * | 2015-06-18 | 2016-12-28 | 中兴通讯股份有限公司 | A kind of multicast management method, device and switching equipment |
| EP3535891B1 (en) * | 2016-11-07 | 2020-08-19 | Telefonaktiebolaget LM Ericsson (publ) | Transmission of guaranteed and non-guaranteed data packets on redundant links |
| CN110086782B (en) * | 2019-03-29 | 2022-04-15 | 岭博科技(北京)有限公司 | Hotel Internet of things intelligent control system, intelligent control equipment method and electronic equipment |
| CN115150215A (en) * | 2022-06-28 | 2022-10-04 | 中国电信股份有限公司 | Home multicast implementation method and device, computer storage medium and electronic equipment |
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| US8683078B2 (en) * | 2006-03-07 | 2014-03-25 | Samsung Electronics Co., Ltd. | Method and system for quality of service control for remote access to universal plug and play |
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| WO2008002294A1 (en) * | 2006-06-27 | 2008-01-03 | Thomson Licensing | Method and apparatus for reliably delivering multicast data |
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2009
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- 2009-11-30 KR KR1020117016354A patent/KR101501913B1/en not_active IP Right Cessation
- 2009-11-30 US US13/130,017 patent/US8559353B2/en not_active Expired - Fee Related
- 2009-11-30 WO PCT/EP2009/008659 patent/WO2010069480A1/en active Application Filing
- 2009-11-30 CN CN200980150474.1A patent/CN102257764B/en not_active Expired - Fee Related
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| WO2007081171A1 (en) * | 2006-01-13 | 2007-07-19 | Lg Electronics Inc. | Method and apparatus for obtaining information for transfer of an external content |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2010069480A1 (en) | 2010-06-24 |
| CN102257764A (en) | 2011-11-23 |
| JP5548696B2 (en) | 2014-07-16 |
| US20110274109A1 (en) | 2011-11-10 |
| US8559353B2 (en) | 2013-10-15 |
| EP2200219A1 (en) | 2010-06-23 |
| KR20110095948A (en) | 2011-08-25 |
| KR101501913B1 (en) | 2015-03-12 |
| JP2012512585A (en) | 2012-05-31 |
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